Hi XXXXXXX Thanks for writing in to Healthcare Magic!It is nearly impossible to have a fungal infection now in a 30year old implanted plate.I think you have the infection in the superficial layers of skin.Take a treatment course of antifungal medicines from your physician and it would be cured. I think you do not need to worry about the link between the plate and this infection.If you have any further query please let me know I would try to answer it for you.Wish you a great health!